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The Syntax Of Equations; Operator Precedence - HP 35s User Manual

Scientific calculator.
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To change the number, type the new number and press
number writes over the old value in the X–register. You can enter a number as
a fraction if you want. If you need to calculate a number, use normal
keyboard calculations, then press
mode. Before pressing
after pressing
To cancel the prompt, press
the X–register and displays in right-side of the line two. If you press
during digit entry, it clears the number to zero. Press
To display digits hidden by the prompt, press
In RPN mode,each prompt puts the variable value in the X–register and disables
stack lift. If you type a number at the prompt, it replaces the value in the X–register.
When you press

The Syntax of Equations

Equations follow certain conventions that determine how they're evaluated:
How operators interact.
What functions are valid in equations.
How equations are checked for syntax errors.

Operator Precedence

Operators in an equation are processed in a certain order that makes the
evaluation logical and predictable:
Entering and Evaluating Equations
in RPN mode, or press 2
, the result of the expression will display in line 2.
, stack lift is enabled, so the value is saved on the stack.
. For example, you can press 2
, the expression will display in line 2, and
. The current value for the variable remains in
 
. This new
in ALG
again to cancel the


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